Probing Planet Formation with APOGEE: A Dichotomy in Planet Orbital-Periods and Stellar Metallicities

Abstract:

The Apache Point Observatory Galactic Evolution Experiment (APOGEE) is a near-infrared (1.5-1.7 microns), high resolution (R~ 22,500), high S/N (> 100), spectroscopic survey as part of the Sloan Digital Sky Survey (SDSS). Among the goals of this survey is multi-epoch monitoring of exoplanetary systems discovered by the Kepler mission, resulting in very high S/N (typically a few hundred) observations of Planet-hosting stars. The combined visits and sensitivity of the Sloan 2.5-meter telescope yield stellar parameters for a large number of planet-hosting systems with higher precision (eg, dex), and deeper observations (H< 14) than many other spectroscopic surveys of similar scale. We have combined this rich dataset with orbital and planetary properties from the Kepler mission to reveal a correlation with stellar metallicity and planet orbital period in close-in (P< 100 days), small (R_p< 20 R_earth …

Año de publicación:

2018

Keywords:

Fuente:

google